Traction splint

ABSTRACT

The present invention provides a splint that may be telescopically extendable, coarsely and finely adjustable, and providing a mechanical advantage while being readily transportable. The splint may have two to three telescoping members that nest inside one another when not in use, and may be triangular, rectangular, or circular in cross section. The present invention also provides a single member adjustable splint.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to traction splints.

2. Description of the Prior Art

There have been several attempts to design portable devices that provideexternal traction to an injured limb. For example, U.S. Pat. No.4,608,971 to Borschneck describes an emergency leg splint thattelescopes for length adjustment. However, splints like Borschneck's arerelatively large and heavy making them difficult to transport.

Splints designed to be portable such as Borschneck's also do not providea mechanical advantage, so these splints cannot be used to reducefractures or relocate joints like the elbow, shoulder, knee or hip.Current portable splints are also generally designed specifically toimmobilize a person's leg or specifically to immobilize a person's arm,so it is necessary to have available both a leg splint and an arm splintto select from depending on the limb injured. Furthermore, currentportable splints cannot be adjusted to exactly fit the limb beingsupported.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to provide a compact,lightweight versatile splint.

It is another object of the present invention to provide a splint havingboth a coarse and a fine adjustment device.

It is another object to provide a splint having a mechanical advantage.

In a first aspect, the present invention provides a splint comprising:an outer member having a distal end and a proximal end; a middle memberslidable in a longitudinal direction within the outer member, the middlemember having a distal end and a proximal end; an inner member slidablein a longitudinal direction within the middle member, the inner memberhaving a distal end and a proximal end; a coarse adjustment means foradjusting a distance between the distal end of the middle member and aproximal end of the outer member by a plurality of course increments; afine adjustment means for adjusting a distance between the distal end ofthe inner member and a proximal end of the middle member by a pluralityof fine increments.

In a second aspect, the present invention provides a splint comprising:an outer member having a distal end and a proximal end; an inner memberslidable in a longitudinal direction within the outer member, the innermember having a distal end and a proximal end; an adjustment means foradjusting a distance between the distal end of the inner member and aproximal end of the outer member by a plurality of fine increments.

In a third aspect, the present invention provides a splint comprising:an elongated member having a distal end and a proximal end; a cord meansextending through a hollow portion of the elongated member, the cordmeans including: a distal securing means for securing the elongatedmember to a limb of an individual, the distal securing means mounted atone end to the distal end of the elongated member and a loop portionextending from the distal end of the elongated member; a free end forgrasping by a user and for allowing a user to pull on the cord means tocause the loop portion of the distal securing means to pull the limb ofthe individual towards the elongated member; and a connecting portionconnecting the loop portion of the distal securing means to the freeend; and a proximal securing means for securing the elongated member tothe limb of the individual, the proximal securing means being mounted onthe elongated member at a position proximal to the distal end of theelongated member.

Other objects and features of the present invention will be apparentfrom the following detailed description of the preferred embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described in conjunction with the accompanyingdrawings, in which:

FIG. 1A is a schematic perspective view of a first embodiment of atraction splint of the present invention;

FIG. 1B is a schematic cross-sectional view of the embodiment of FIG.1A;

FIG. 1C is a schematic perspective view of an outer member of theembodiment of FIG. 1A;

FIG. 1D is a schematic side view of a middle member of the embodiment ofFIG. 1A;

FIG. 1E is a schematic side view of an inner member of the embodiment ofFIG. 1A;

FIG. 2A is a schematic perspective view of a second embodiment of atraction splint of the present invention;

FIG. 2B is a schematic cross-sectional view of the embodiment of FIG.2A;

FIG. 3A is a schematic perspective view of a third embodiment of atraction splint of the present invention;

FIG. 3B is a schematic cross-sectional view of the embodiment of FIG.3A;

FIG. 4A is a schematic perspective view from one angle of a fourthembodiment of a traction splint of the present invention;

FIG. 4B is a schematic perspective view from a second angle of theembodiment of FIG. 4A;

FIG. 5 is a schematic view of a fifth embodiment of a traction splint ofthe present invention; and

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Definitions

For the purposes of the present invention the term “individual” refersto either an individual person or animal on whom the splint of thepresent invention is used.

Unless specified or shown otherwise, for the purposes of the presentinvention, the term “distal end” generally refers to the end of a splintfrom which an inner member of the splint extends or from which anadjustable securing device extends. The other end of the splint isreferred to as the “proximal end”.

For the purposes of the present invention, the term “longitudinal”refers to a direction along the length of a splint from either theproximal end to distal end or from the distal end to the proximal end.

For the purposes of the present invention, the term “opposed openings”refers to a pair of corresponding openings on opposite sides of amember.

For the purposes of the present invention, the term “cord” refers to anytype of cord, natural or synthetic rope, line, chain, etc. that can beused with a pulley of the present invention. When used as part of anadjustment device of the present invention, the cord is preferablyflexible yet sufficiently strong to resist tearing or breaking whilepassing over pulley posts and moving inner and middle members relativeto one another. Although the term a rope is used as a cord in theembodiments shown in the drawing figures and described below, it shouldbe understand that various kinds of cords can be used in place of therope of these embodiments.

For the purposes of the present invention, the term “pulley” refers toone or more surfaces, one or more posts, one or more wheels, etc. overwhich, around which, or through which a cord of the present inventiontravels to provide a user of a traction splint of the present inventionwith a mechanical advantage. For the purposes of the present invention,the term “pulley system” refers to the combination of the cord and allof the pulleys in a particular traction splint of the present invention.Utilizing multiple wheels as pulleys in a pulley system of the presentinvention allows the user to increase the mechanical advantage of atraction splint of the present invention.

For the purposes of the present invention, the term “limb” refers to anypart of a person's leg, including: the foot, ankle, knee, hip, etc. andany part of a person's arm, including: the shoulder, elbow, wrist, hand,etc. The term “limb” may also refer to any part of an individual whichmay be braced by a rod or splint such as an individual's back, neck,etc.

For the purposes of the present invention, the phrase “securing a splintto a limb” refers not only to directly securing the splint of thepresent invention to an individual's limb, but also to securing thesplint clothing or other objects adjacent to, surrounding or attached toan individual's limb. For example, the splint of the present inventionmay be secured to an individual's sleeve, pant's leg, sock, shoe, thighpad, leg wrap, etc.

For the purposes of the present invention, the term “analog adjustmentdevice” refers to a device that may increase or decrease the length ofthe splint of the present invention by a wide variety of differentincrements. For example, the pulley system illustrated in the embodimentof FIG. 3A below is such an analog adjustment device. The pulley systemallows the length of the splint to be extended by very small, almostcontinuous increments. In contrast, the term “discrete adjustmentdevice” refers to devices which adjust the length of the splint of thepresent invention by particular set amounts. For example, bothadjustment devices described in the embodiment illustrated in FIG. 1Aare “discrete adjustment devices”. In these two adjustment devices, thespacing of the holes or slots determines the increments by which thesplint's length may be extended.

For the purposes of the present invention, the terms “coarse adjustment”and “fine adjustment” are relative. For a particular splint of thepresent invention, a coarse adjustment device adjusts the length of asplint by an increment larger than the increment that the fineadjustment device adjusts the length of the splint.

For the purposes of the present invention, the term “selectivelyengaging” refers to a plunger, rod, etc. extending into or through oneor more openings that are aligned with the plunger, rod, etc. when twoor more of the members of the splint of the present invention are ingiven relationship with one another. For example, in a splint such asthat shown in FIGS. 1A and 1B, a plunger on the middle member mayselectively engage the first, second, or third opening from the distalend of the outer member, depending on the position of the outer memberrelative to the middle member.

For the purposes of the present invention, the term “attached” whenreferring to a cord of the present invention being attached to member ofa splint of the present invention refers to a variety of conventionalmethods of attachment of one end of a cord to a member. For example,when the cord of the present invention is a rope, a rope can be attachedto member threading one end of a rope through a hole in the member andknotting the rope so that the end of the rope cannot pass back throughthe hole. A rope can also be attached with an adhesive, cleat, velcro,staple, etc. or other conventional means for fixing a rope to a member.What is important is that when a cord of the present invention isattached to a member, the attached end of the cord is held or eventuallyprevented from moving any further, such as by a knot being preventedfrom going through a hole, when a user pulls on the free end of thecord.

For the purposes of the present invention, the term “constriction loop”refers to an adjustable loop that is used to secure a member of a splintof the present invention to a limb of an individual. A constriction loopis adjustable in the sense that the diameter of a constriction loop canbe adjusted to fit the diameter of one of the portions of the limb towhich the traction splint of the present invention is secured. Aconstriction loop can be formed by twisting an adjustable cord of thepresent invention or may be a separate loop mounted on an adjustablecord of the present invention. A constriction loop may be constructedfrom rope, velcro, cloth, etc.

Description

FIGS. 1A, 1B, 1C, 1D, and 1E illustrate one preferred embodiment of thepresent invention. A three-member traction splint 100 includes an outermember 102 having an outer member distal end 104 and an outer memberproximal end 106. Located inside outer member 102 is a middle member 108having a middle member distal end 110 and a middle member proximal end112 (visible in FIG. 1D). Located inside middle member 108 is an innermember 114 having an inner member distal end 116 and an inner memberproximal end 118 (visible in FIG. 1E). A distal securing device 120 isprovided at inner member distal end 116, and a proximal securing device130 is provided at outer member proximal end 106. Distal securing device120 and proximal securing device 130 allow traction splint 100 to besecured to an individual (not shown).

In the embodiment shown in FIGS. 1A through 1E, the distal securingdevice and the proximal securing device are shown as rings that couldreceive a rope, hook and loop fastener, or any other appropriate meansof attaching the splint of the present invention to the individual. Thedistal securing device and the proximal securing device can be fixed orremovably attached, and can be of any variety of sizes and shapes asdesired for a particular use. While the members shown in the embodimentof FIGS. 1A through 1E are triangular in cross-section, it iscontemplated that the members could be circular, oval, square,rectangular, or other shape in cross-section.

Traction splint 100 includes a coarse adjustment device 136. Coarseadjustment device 136 consists of a series of circular holes 138 and aconventional spring loaded plunger 142 (only a portion of which isvisible in FIG. 1A). Although there are three holes depicted, the numbercan vary depending on the particular use. Spring loaded plunger 142 ismounted on middle member 108 and is designed to engage any one of holes138. Only one of holes 138 may be engaged at any time, and plunger 142must be actively depressed to disengage plunger 142 from one of holes138. Once plunger 142 is disengaged, middle member 108 and plunger 142can be moved along the inside of outer member 102 until desired one ofholes 138 is engaged as shown in FIG. 1A. Using the procedure justdescribed, coarse adjustment device 136 is able to fix the location ofmiddle member 108 relative to outer member 102 and provides coarseadjustment of splint length L₁.

Although the holes and corresponding plunger of the coarse adjustmentdevice are depicted as circular in the embodiment shown in FIGS. 1Athrough 1E, other shapes such as oval, triangular, square, etc. may beused in the traction splint of the present invention. Also, the coarseadjustment device may consist of a pair of opposing holes through whicha screw, bolt, etc. may extend to fix the position of the middle memberrelative to the outer member.

Traction splint 100 also includes a fine adjustment device 144. Fineadjustment device 144 consists of a plurality of slots or openings 146on an inner member first side 148 that are engaged by a ratchet 152. Aratchet handle 154 allows a user (not shown) to manipulate ratchet 152.When not in use, ratchet handle 154 is stored on middle member 108 asdepicted in FIG. 1D. A brake 156 for fine adjustment device 144 consistsof a brake distal end 158, a brake middle portion 160, a brake proximalend 162, a spring or brake resistance device 164, and a brake pivot 166.Brake proximal end 162 can be depressed by a user (not shown) todisengage brake 156. Brake distal end 158 is configured to engageopenings 168 on a second side 170 of inner member 150. Brake distal end158 is urged against second side of inner member 150 by brake resistancedevice 164 located between brake proximal end 162 and middle memberdistal end 110. Inner member distal end 116 is free to move in a distaldirection away from middle member distal end 110 when brake 156 is inuse. However, openings 168 will engage brake distal end 158 and therebystop inner member distal end 116 as inner member distal end 116 travelstoward middle member distal end 110. Brake pivot 166 is located betweenbrake 156 and middle member 108. Brake pivot 166 allows the use of brakeresistance device 164 to urge brake distal end 158 to engage innermember 114.

Fine adjustment device 144 restrains the movement of middle member 108relative to inner member 114 and provides fine adjustment of splintlength L₁.

The ratchet, brake, and slots of the fine adjustment device of thepresent invention can vary in size and distribution to change the degreeof fine adjustment of the traction splint of the present invention.

The combination of coarse and fine adjustments shown in the embodimentof FIGS. 1A through 1E allow the splint to apply precise and tighttraction and may be used to reduce fractures or dislocated joints.Furthermore, the compact design allows the splint to be portable. Such aportable splint can be used by backpackers as well as all types ofemergency medical personnel. The traction splint of the presentinvention can also be utilized for injuries to the upper and lowerextremities.

FIGS. 2A and 2B illustrate a second preferred embodiment of the presentinvention. A three-member traction splint 200 includes an outer member202 having an outer member distal end 204 and an outer member proximalend 206. Located inside outer member 202 is a middle member 208 having amiddle member distal end 210 and a middle member proximal end 212.Located inside middle member 208 is an inner member 214 having an innermember distal end 216 and an inner member proximal end 218. A distalsecuring device 220 is provided at inner member distal end 216, and aproximal securing device 230 is provided at outer member proximal end206. Distal securing device 220 and proximal securing device 230 allowtraction splint 200 to be secured to an individual (not shown).

Although for convenience the members of the traction splint shown inFIGS. 2A and 2B are made of a translucent or transparent plasticmaterial, the materials used to form the traction splint of the presentinvention may be solid materials as shown in the embodiment of FIGS. 1Athrough 1E.

In the embodiment shown in FIGS. 2A and 2B, the distal securing deviceand the proximal securing device are shown as rings that can receive arope, hook and loop fastener, or any other appropriate means ofattaching the splint of the present invention to the individual. Thedistal securing device and the proximal securing device can be fixed orremovably attached, and can be of any variety of sizes and shapes asdesired for a particular use.

While the members shown in the embodiment of FIGS. 2A and 2B are squarein cross-section, it is contemplated that the members of the tractionsplint of the present invention can be circular, oval, triangular,rectangular, or other shape in cross-section.

Traction splint 200 includes a coarse adjustment device 232. Coarseadjustment device 232 consists of a series of pairs of longitudinallyaligned holes 234 in outer member 202, a pair of opposed holes 236 inmiddle member 208, and a removable locking post 238 which is insertedthrough holes 236 and a selected pair of holes 234 to fix the positionof middle member 208 relative to outer member 202, thereby providingcoarse adjustment of splint length L₂.

Although the holes and removable locking post of the coarse adjustmentdevice are depicted as circular, other shapes such as oval, triangular,square, etc. may be used in the traction splint of the presentinvention. Also, the locking post can be replaced with a nail, screw,etc. A flattened end on one or both ends of locking post may bedesirable to maintain locking post in a fixed position once the desiredseries of holes are engaged.

A fine adjustment device 244 is also provided for traction splint 200.Fine adjustment device 244 is comprised of a distal pulley post 268, aproximal pulley post 270, a pair of openings or slots 272 in innermember 214, and a rope 274. Proximal pulley post 270 is mounted to theinside of inner member 214, and distal pulley post 268 is mounted to theinside of middle member 208. Loops 278 and 280 of rope wrap arounddistal pulley post 268 and proximal pulley post 270, respectively.Openings 272 in inner member 214 allow for movement of inner member 214relative to middle member 208 without inner member 214 contacting distalpulley post 268. A user of traction splint 200 can pull on the free endof rope 274 to cause loops 278 and 280 of rope 274 around distal pulleypost 268 and proximal pulley post 270, respectively, to tighten and pulldistal pulley post 268 and proximal pulley post 270 toward one another.Fine adjustment device 244 allows for movement of inner member 214relative to middle member 208 and provides fine adjustment of splintlength l. Fine adjustment device 244 also provides mechanical advantage.That allows splint to reduce fractures or dislocations without requiringgreat strength or exertion by the user.

The non-free end of the rope used to finely adjust the traction splintof the present invention may be secured to either pulley post, to eitherinner or middle member, or to any other suitable location on the splint.

FIGS. 3A and 3B illustrate a third preferred embodiment of the presentinvention. A three-member traction splint 300 includes an outer member302 having an outer member distal end 304 and an outer member proximalend 306. Located inside outer member 302 is a middle member 308 having amiddle member distal end 310 and a middle member proximal end 312.Located inside middle member 308 is an inner member 314 having an innermember distal end 316 and an inner member proximal end 318. A distalsecuring device 320 is provided at inner member distal end 316, and aproximal securing device 330 is provided at outer member proximal end306. Distal securing device 320 and proximal securing device 330 allowtraction splint 300 to be secured to an individual (not shown).

In the embodiment shown in FIGS. 3A and 3B, the distal securing deviceand the proximal securing device are shown as rings that can receive arope, hook and loop fastener, or any other appropriate means ofattaching the splint of the present invention to an individual. Thedistal securing device and the proximal securing device can be fixed orremovably attached, and can be of any variety of sizes and shapes asdesired for a particular use. While the members of the traction splintshown in the embodiment of FIGS. 3A and 3B are circular incross-section, it is contemplated that the members can be, oval,triangular, square, rectangular, or other shape in cross-section.

Traction splint 300 includes a coarse adjustment device 332. Coarseadjustment device 332 consists of a series of pairs of longitudinallyaligned holes 338 in outer member 302, a pair of opposed holes 336 inmiddle member 308, and a removable locking post 340 which is insertedthrough holes 336 and a selected pair of holes 338 to fix the positionof middle member 308 relative to outer member 302, thereby providingcoarse adjustment of splint length L₃.

Although the holes and removable locking post of the coarse adjustmentdevice are depicted as circular, other shapes such as oval, triangular,square, etc. may be used in the traction splint of the presentinvention. Also, the locking post can be replaced with a nail, screw,etc. A flattened end on one or both ends of the locking post may bedesirable to maintain the locking post in a fixed position once thedesired series of holes is engaged.

A fine adjustment device 344 is also provided for traction splint 300.Fine adjustment device 344 is comprised of a distal pulley post 368, aproximal pulley post 370, and a rope 374. Proximal pulley post 370 ismounted to the inside of inner member 314, and distal pulley post 368 ismounted to the inside of middle member 308. Loops 378 and 380 of rope374 wrap around distal pulley post 368 and proximal pulley post 370,respectively. Openings in inner member 314 (not shown) allow formovement of inner member 314 relative to middle member 308 without innermember 314 contacting distal pulley post 368. A user of traction splint300 can pull on the free end of rope to cause loops 378 and 380 of rope374 around distal pulley post 368 and proximal pulley post 370,respectively, to tighten and pull distal pulley post 368 and proximalpulley post 370 toward one another. Fine adjustment device 344 allowsfor movement of inner member 314 relative to middle member 308 andprovides fine adjustment of splint length L₃. Fine adjustment device 344also provides mechanical advantage. That allows splint to reducefractures or dislocations without requiring great strength or exertionby the user. Rope 374 is attached to middle member distal end 310 at arope attachment point 381. Once a desired splint length L₃ is achieved,free end of rope can be secured at a cleat 382. Fine adjustment device344 allows inner member 314 to be moved relative to middle member 308and allows fine adjustment of splint length L₃.

The fine adjustment device of the traction splint of FIGS. 3A and 3Bprovides mechanical advantage. Mechanical advantage allows the splint toreduce fractures or dislocations without great strength or exertion bythe user. The cleat is shown at the inner member distal end, but otherlocations on or in the splint may be utilized. The cleat may be aconventional cleat, a hook, or other suitable fastener for securing therope.

FIGS. 4A and 4B illustrate a fourth preferred embodiment of the presentinvention. A two-member traction splint 400 includes an outer member 402having an outer member distal end 404 and an outer member proximal end406. Located inside outer member 402 is an inner member 414 having aninner member distal end 416 and an inner member proximal end 418. Adistal securing device 420 is provided at inner member distal end 416,and a proximal securing device 430 is provided at outer member proximalend 406. Distal securing device 420 and proximal securing device 430attach splint 400 to an individual (not shown).

In the embodiment shown in FIGS. 4A and 4B, the distal securing deviceand the proximal securing device are shown as rings that can receive arope, hook and loop fastener, or any other appropriate means ofattaching the splint of the present invention to the individual. Thedistal securing device and the proximal securing device can be fixed orremovably attached, and can be of any variety of sizes and shapes asdesired for a particular use.

An adjustment device 444 is also provided for traction splint 400.Adjustment device 444 is comprised of a distal pulley post 468, aproximal pulley post 470, a pair of openings 472 in inner member 414,and a rope 474. Proximal pulley post 470 is mounted to the inside ofinner member 414, and distal pulley post 468 is mounted to the inside ofinner member 402. Loops 478 and 480 of rope wrap around distal pulleypost 468 and proximal pulley post 470, respectively. Openings 472 ininner member 414 allow for movement of inner member 414 relative toouter member 402 without inner member 414 contacting distal pulley post468. A user of traction splint 400 can pull on the free end of rope tocause loops 478 and 480 of rope 474 around distal pulley post 468 andproximal pulley post 470, respectively, to tighten and pull distalpulley post 468 and proximal pulley post 470 toward one another. Fineadjustment device 444 allows for movement of inner member 414 relativeto outer member 402 and provides fine adjustment of splint length L₄.Fine adjustment device 444 also provides mechanical advantage. Thatallows splint to reduce fractures without requiring great strength orexertion by the user. Rope 474 is attached to outer member distal end404 at a rope attachment point 481. Once a desired splint length L₄ isachieved, free end of rope can be secured at a cleat 482. Fineadjustment device 444 allows inner member 414 to be moved relative toouter member 402 and allows fine adjustment of splint length L₄.

The adjustment device of the traction splint provides mechanicaladvantage. Mechanical advantage allows the splint to reduce fractures ordislocations without great strength or exertion by the user. The ropelocking point is shown along the inner member distal end, but otherlocations on or in the splint may be utilized. The rope locking pointmay be comprised of a hook, cleat, or other suitable fastener forsecuring the rope.

FIG. 5 illustrates a fifth embodiment of the present invention. Asingle-member traction splint 500 includes a hollow member 502 having amember distal end 504 having an opening 506 and a member proximal end508 having an opening 510. A rope 512 extends through hollow member 502and includes a rope distal end 514 which extends from member distal end504 and a free rope end 516 that extends from member proximal end 508. Aconstriction loop 518 is formed by forming a twist 520 at one end ofrope distal end 514. Constriction loop 518 is used to secure tractionsplint 500 to a first end 522 of an individual's limb 524 (shownschematically for simplicity of illustration) by looping constrictionloop 518 around first end 522 and using a ring connection device 526 toattach to constriction loop 518 by sliding constriction device 526distally on rope distal end 514. A proximal securing loop 528 isattached to member proximal end 508 and is looped around a second end530 of limb 524. By pulling on free rope end 516, first end 522 andsecond end 530 of limb 524 are pulled away from each other,straightening limb 524 and taking pressure off a fracture 532 in limb524.

The distal end of the rope is preferably attached to the distal end ofthe member as depicted in FIG. 5, but can also be located at anotherlocation on or in the member. The rope can be fixed or removablyattached to the member. The proximal securing loop is preferablyattached to the proximal end of the member as shown in FIG. 5, but couldbe located somewhat away from the proximal end. Instead of being a pieceof rope, the proximal securing loop and distal constriction loop can bemade of fabric, velcro, etc.

Proximity between the member distal end and the point distal to thefracture is desirable, as well as the rope loop fitting snugly aroundthe point distal to the fracture being secured. Although shown as aring, the constriction device for the traction splint shown in FIG. 5can be any suitable device that allows for rope movement. The length,relative straightness, and stability provided by the hollow member ofthe splint combined with a steady pull on the rope by a user contributeto a smooth straight motion of the point distal to the fracture awayfrom the fracture, thereby reducing or securing the fracture andpossibly alleviating some discomfort felt by the individual.

The hollow member shown in FIG. 5 can be circular, oval, triangular,square, rectangular, or other shape in cross-section as desired. Theratio of length to width of the hollow member can be various chosenratios. Although the fifth embodiment of the present invention describesa hollow tube as the member, it is contemplated that a solid orotherwise not consistently hollow device could form a portion of themember. The member preferably has a hollow portion which allows the ropeto pass through, but it is not necessary that the entire member behollow. Also, the hollow portion of the member need not be of consistentdiameter through the length of the tube, or centered, as shown in theembodiment of FIG. 5.

In choosing a member for the splint for a particular application, it isimportant to consider the number of coils of rope to be containedtherein and the diameter of the rope to be employed. A suitably sizedmember can allow for ease of movement of the rope loops within themember but still be compact enough to be readily transportable.

Although the components in many of the embodiments of the tractionsplint of the present invention shown above are shown in a semi- orcompletely transparent state for convenience of illustration, the actualmaterials used to construct the structures of the present invention mayor may not be translucent or transparent. Materials appropriate forconstruction of the outer, middle, and inner members include: metal,preferably light yet strong metals such as aluminum or titanium, durableplastics, wood, etc.

One of the benefits of the traction splint of the present invention isits ability to be readily transportable due to size and shape.Accordingly, lighter materials are favored but the invention may stillbe practiced with heavier materials.

Although only a few types of adjustment devices are illustrated in thedrawing figures and described above, the present invention encompassesvarious types of conventional adjustment devices that can be used tomove two members relative to each other such as: hole-and-post-typedevices, ratchet devices, spring-loaded devices, pulley devices,screw-type devices, etc.

Although the present invention has been fully described in conjunctionwith the preferred embodiment thereof with reference to the accompanyingdrawings, it is to be understood that various changes and modificationsmay be apparent to those skilled in the art. Such changes andmodifications are to be understood as included within the scope of thepresent invention as defined by the appended claims, unless they departtherefrom.

What is claimed is:
 1. A splint, comprising: an outer member having adistal end and a proximal end; a middle member slidable in alongitudinal direction within said outer member, said middle memberhaving a distal end and a proximal end; an inner member slidable in alongitudinal direction within said middle member, said inner memberhaving a distal end and a proximal end; a coarse adjustment means foradjusting a distance between said distal end of said middle member and aproximal end of said outer member by a plurality of course increments; afine adjustment means for adjusting a distance between said distal endof said inner member and a proximal end of said middle member by aplurality of fine increments, said fine adjustment means comprising apulley system including: a distal pulley post mounted inside said middlemember; a proximal pulley post mounted inside said inner member; a cordmeans, said cord means being looped at least once around said distalpulley post, being looped at least once around said proximal pulleypost, and having an attached end attached to said middle member and afree end extending from said splint, so that when said free end ispulled, said distal pulley post and said proximal pulley post movetowards each other and said distal end of said inner member and saidproximal end of said middle member move away from each other.
 2. Thesplint of claim 1, wherein: said coarse adjustment means is comprised ofa plurality of openings in said outer member and a spring loaded plungermounted on said middle member for releasably and selectively engagingone of said openings in said outer member.
 3. The splint of claim 1,wherein said coarse adjustment means comprises: at least two pairedopposed and aligned first openings in a first member selected from thegroup consisting of said outer member and said middle member; aplurality of paired opposed and aligned second openings in a secondmember from the group consisting of said outer member and said middlemember, wherein said first member and said second member are not thesame; and a post for engaging and extending through two of said pairedfirst openings in said first member, and through two of said pluralityof paired second openings in said second member for preventinglongitudinal movement of said middle member relative to said outermember when said post extends through said paired first openings andsaid paired second openings.
 4. The splint of claim 1, wherein said freeend of said cord means extends from said splint through an opening insaid inner member.
 5. The splint of claim 1, further comprising: adistal securing means attached to said distal end of said inner memberfor securing said inner member to an individual's limb; and a proximalsecuring means attached to said proximal end of said outer member forsecuring said outer member to an individual's limb.
 6. The splint ofclaim 5, wherein said distal securing means comprises a ring and saidproximal securing means comprises a ring.
 7. The splint of claim 1,wherein said outer member, said middle member, and said inner member areeach triangular in cross-section.
 8. The splint of claim 1, wherein saidouter member, said middle member, and said inner member are eachrectangular in cross-section.
 9. The splint of claim 1, wherein saidouter member, said middle member, and said inner member are eachcircular in cross-section.
 10. A splint, comprising: an outer memberhaving a distal end and a proximal end; an inner member slidable in alongitudinal direction within said outer member, said inner memberhaving a distal end and a proximal end; an adjustment means foradjusting a distance between said distal end of said inner member and aproximal end of said outer member by a plurality of fine increments,said adjustment means comprising a pulley system including: a proximalpulley post mounted inside said inner member; a distal pulley postmounted inside said outer member; a cord means, said cord means beinglooped at least once around said distal pulley post, being looped atleast once around said proximal pulley post, having an attached endattached to said outer member and a free end extending from said splint,so that when said free end is pulled, said distal pulley post and saidproximal pulley post move towards each other and said distal end of saidinner member and said proximal end of said outer member move away fromeach other.
 11. The splint of claim 10, wherein said free end of saidcord means extends from said splint through an opening in said innermember.
 12. The splint of claim 10, further comprising: a distalsecuring means attached to said distal end of said inner member forsecuring said inner member to an individual's limb; and a proximalsecuring means attached to said proximal end of said outer member forsecuring said outer member to an individual's limb.
 13. The splint ofclaim 12, wherein said distal securing means comprises a ring and saidproximal securing means comprises a ring.
 14. The splint of claim 10,wherein said outer member and said inner member are each triangular incross-section.
 15. The splint of claim 10, wherein said outer member andsaid inner member are each rectangular in cross-section.
 16. The splintof claim 10, wherein said outer member and said inner member are eachcircular in cross-section.